Can anyone tell me the actual outside diameter of the flange on the 4"

I used 4" schedule 40 PVC and it fit snugly on the 4" blast gate. I also drilled and screwed two sheet metal screws per blast gate (along with silicon sealer)

Are they both 4" od, or is one size 4"id for dc machine port?

No, They are 3 11/16 id and 3 13/16 + 1/32 od. There is nothing 4" here.

any suggestions on how to attach this to 4" DWV? The pipe is too large for these.

I didn't hook them up to 4inch. I ran 2 3/4 flex and pvc. Btw...it clogs up with saw dust. I drilled a hole on side opposite the slide with a forsner bit to blow it out. I cover the hole with duct tape.

The action on the 4" plastic version is very rough / jerky. Any successful method of smooting the action? Grease?

I found it varies from one gate to another. Applying wax from a candle or similar source, helped but did not fully fix the issue. I just rubbed it on the flat portion that fits in the groove and worked it back and forth. I would be afraid that grease would trap dust. I prefer metal gates.

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POWERTEC 70108 4 Inch Blast Gate for Dust Collector, Dust Collection Fittings

POWERTEC 70108 4 Inch Blast Gate for Dust Collector, Dust Collection Fittings

Product ID: 4132545

Details

Brand
POWERTEC
Color
4" Blast Gate
Connector Type
Slip
Global Trade Identification Number
Item Weight
5.6 ounces
Item dimensions L x W x H
6.6 x 6.5 x

📏4-inch nominal diameter fit

🔄Manual airflow regulation

🛡️Abrasion-resistant ABS plastic

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Description

💨 Take control of your dust—because your workspace deserves precision airflow!

PRECISION 4 INCH FIT - Seamlessly connects with 4” ID dust hoses and ports for a professional-grade dust collection setup.
UNIVERSAL COMPATIBILITY - Works with most flexible hoses and dust ports; just add a flex cuff for 4” OD connections to customize your system.
DURABLE ABS CONSTRUCTION - Built to withstand daily wear from sawdust and woodchips, ensuring long-lasting performance.
EASY MAINTENANCE REMINDER - Designed for smooth operation with a simple cleaning routine to prevent clogging and sticking.
OPTIMIZED AIRFLOW CONTROL - Manual blast gate design maximizes dust collection efficiency by directing airflow exactly where you need it.

The POWERTEC 70108 4 Inch Blast Gate is a premium ABS plastic dust collection accessory designed to regulate airflow in workshop dust systems. Featuring a nominal 4-inch diameter, it fits 4” ID hoses and ports, enhancing dust collection efficiency by directing vacuum flow to specific machines. Durable and abrasion-resistant, this manual gate requires minimal maintenance and is compatible with most professional and home workshop setups, making it an essential upgrade for cleaner, safer workspaces.

Specifications

ASIN	B005VRPQ92
Best Sellers Rank	#34,395 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Vacuum & Dust Collector Replacement Parts #63 in Power Tool Replacement Parts
Brand Name	POWERTEC
Color	4" Blast Gate, 1pk
Connector Type	Slip
Customer Reviews	4.5 4.5 out of 5 stars (2,104)
Global Trade Identification Number	00736815003416
Included Components	4-Inch Blast Gate for Vacuum/Dust Collector
Item Dimensions	6.6 x 6.5 x 3.5 inches
Item Type Name	POWERTEC 70108 4 Inch Blast Gate for Dust Collector/ Vacuum Fittings
Item Weight	5.6 ounces
Manufacturer	POWERTEC
Manufacturer Part Number	70108
Material Type	Acrylonitrile Butadiene Styrene
Model Number	70108
Number of Pieces	1
Set Name	Single
Size	4" (1pk)
UPC	074994519060 736815003416
Unit Count	1.0 Count

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Rp424675

Duties & taxes included

In stock

Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

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